Multicylinder pump



Feb. 16311926.

muni

H. sANDoz MULTIYLINDER PUMP Filed sept. 29 1925 HH Il Il Il H II ll IVINI HHH Il ramal ra. 16,1926. d

untreu, STATI:

PATENT OFFICE.

HENRI' SANDOZ, OF T AVANNES, SWITZERLAND, ASSIGNOR T0' TAVANNES WATCHCO., S. A., OE'TAVANNES, SWITZERLAND, A CORQPORATILON OF SWITZERLAND.'

l MULTIcYL'INDEn rum?.

Application led September'29, 192.5. Serial No. 59,262. I

To @ZZ/whom t may concern:

Be it known that I, HENRI SANDoz, a citilen ofthe Republic ofSwitzerland, residing at Tavannes, in the Canton of Berne, Swit'zerland, have invented new and useful Imrovements `in"lMi1rlticylinderv`Pumps, "of

which the following is a specification.

This invention relates to multi-cylinderpumps intended mainly for thesuction and.

Aforcingvof liquids of sirupy' constituency, such as 'viscose used inthe manufacture 'of artificial silk.

Among the best-known multi-cylinder pumps serving to force viscosethroughdies or plates there lare some of which the cylinders are formedby recesses, provided in a rotatablecylindrical body, disposed parallelto the axis of rotation of this body and at equal distances fromtheaXis, the cylindri cal body rotating in a cylindrical casing inwhichvit fits, except over a part correspond- Ving to the bottoms of therecesses where it is not in contact with the internal Wall of the casingat this non-circularpart, except on the diametrically opposedgeneratrices,A

in 4such manner as to form with this part of the internal wall of thecasing two chambers, an inletcha'mber'and a delivery chainber, withwhich ea'ch recess or cylinder communicates .alternately in the courseof each rotation of the cylindricalbody, the cylinders havingreciprocating pistons connected to a rotating member, controlled by thecylindrical body and the axis of which cuts at an angle that of thecyiindrical body.

The pump in accordance with the inven-v tion is of the type abovereferred to and is characterized by the fact that the liquidv drawn inand forcedby the piston plungers is led towards the above-mentionedinlet chamber by way of a chamber enclosing .the piston connectingmembers, in such manner that the liquid is subjected in the Dump itselfto an energetic agitation under the ac-y tion of the connecting membersand that it continuously lubricates the movable parts of the pump.

rThis arrangement 'gives to the pump forming the subject of the presentinvenlubricant, "avoiding the need for oil orf grease, which byinfiltration would mix and eventually combine With the viscose, alteringtherchemical and physical properties required-,oi the latter.

The annexed drawing shows. byvwa'y of example onev embodiment of theinven or recesses disposed parallel 'to its axis of.

rotation and -at equal distances from such axis.. These: recessesconstitute .the cylinders or pump bpdiesof the pump and each have aplunger 4. vAt the bottom of-each recess lis provided a lateral port 5,which communicates during each rotationof the body 2 alternately with asuction chamber 6' and.

'a delivery chamber 7. These chambers pro.-

vided in the casing 1 oppositethe bottoms of the holes symmetrically onopposite 4sides-of the body 2 have a transverse section of crescentform. The suction chamber @communicates by a passage 8 formed in i thecasing 1 with a chamber 9 formed in the casing 1 between the cover 1 ()yof the latter and the body 2. To the chamber 9 there is connected at 11a pipe Il by whichthe viscose is introduced.v The delivery chambercommunicates by the opening 12 with a pipe 13 by which theI viscose isdischarged to the dies or 'the like'. 4

In` the cylindrical body 2 is secured a spindle 14 connected through auniversal joint 15 with a pivot 16, provided Ona. spherical segment 17having a head 18 entering a cavity 19 in the cover 10 of the case V l.Thespheri'cal portion of the Vsegment 17 bears on a correspondingspherical surface on the cover 10, so that. the segment may slide overthe said surface and may be more or less inclined in relation to theaxis of rotation of the body 2, -thecentre of the spherical segmentcoinciding withy the centre of rotation of the universalv jointel. Thesegment is held by two screws 20, 21, in' the cover 10, permitting of thsegment being given any desired inclination.

i??? 7 and through the opening i2 i (Lul l pump Whiie it is inoperebeuiing with its en 'the pump may be coinuce ih?, 1P-nt im ig; byexpelling" Jshe Viscose so of the pi :mi uie movebiy litter rompenetrai*Ioni* smell bz ties causing de when ietzei. uipose the piA- il 'i o u,oooh (not shown she pump 1s in oper :neeessufiiv7 i f e inclined to -esegment ovei7 pui; ieipzites in the Inova-me der pump i eiudmg" a @astion of ihe'body Eis u result t? ou] b ody i'otaaabie"wihin Said impartsto. the pistons i u reci1^ Y l of'iindrieui bod?,T formed with movementand determines Jhe stroke the iet'er beine: the Greater die distant'i'oin seid exis euch 7 o p y, L j. inclined the piutez to the :uns oitio dui-ing: @he eyundeijs oi sind of the e'` lindi'ieul bod 'nun o. saidcasing io i x C i i 1 e, The operation oi J`he pump is :is i eailyopposeo suction -und de- Viseose enters by the pipe l1 und/i with whichthe ejyiindoi's ou suie of about two aifmospheres body are brough; 1bnsononttui'n, phuif nge d in By the aeion of the members couueo. pistons,Which are set in i'upid roti Viscose is' subjected to energetic thechamber 9, which i'endeis it homogeneous. At 4the suine iubiioates thebody 2, the pie f imei-nal movable pai-ts oi the pui die chamber 9 thevviscose is ,n and partly drawn intothe suoU1 G through the passage 8.Fri/ein l drawn by the piungers 4 oi; hhs thiough the portsb und is :itonce izhrough the llatter into Athe deiivel f eonneeld' compartmentidiieafv body to e connecti compartment hereby the liquid to be drawn iulii'ough said coinpmtn'ien und u'iil ed to eiiergeie ug'itaion' by said:zonnei'ikiug member ,und will hibiinov-Able parts of rthe pump,

inou,Y whereof have signed my this specification.

i-iuiuusnunoz;

l5 connected to the dies oi1 the i Y The Viscose is thus Constantly neurem- I "'.L l L oompuitinen'a und u connection

